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why waste the server bandwidth telling us all what sould common knowledge to most folks on here?.
The logo is from Siemens & Halske, the predecessor to today's Siemens. And in that package, it's almost certainly an RF transistor.A quick search for "siemens 98R RF transistor" turns up the Siemens BFT 98 transistor. Looking at the modern datasheet, it comes in case variants with and without a mounting stud. But the datasheet doesn't indicate "98R" marking, so either it's a different part after all, or they changed the markings at some point. The old databook page (available at https://www.web-bcs.com/transistor/tc/bf/BFT98.php in German and p. 766 of https://ia801909.us.archive.org/28/items/httpsarchive.orgdetailselectroarch2/S/SiemensTransistorsDataBook1980-81_text.pdf in English) doesn't mention the studless option, so it's also conceivable that these were originally custom made for a customer.P.S. Please use the forum's own image hosting, so that images (and thus context) won't go missing if/when the external image goes away.
Quote from: tooki on February 24, 2024, 11:12:12 amThe logo is from Siemens & Halske, the predecessor to today's Siemens. And in that package, it's almost certainly an RF transistor.A quick search for "siemens 98R RF transistor" turns up the Siemens BFT 98 transistor. Looking at the modern datasheet, it comes in case variants with and without a mounting stud. But the datasheet doesn't indicate "98R" marking, so either it's a different part after all, or they changed the markings at some point. The old databook page (available at https://www.web-bcs.com/transistor/tc/bf/BFT98.php in German and p. 766 of https://ia801909.us.archive.org/28/items/httpsarchive.orgdetailselectroarch2/S/SiemensTransistorsDataBook1980-81_text.pdf in English) doesn't mention the studless option, so it's also conceivable that these were originally custom made for a customer.P.S. Please use the forum's own image hosting, so that images (and thus context) won't go missing if/when the external image goes away.There are two types. The BFT98 with mounting stud and the BFT98B without mounting stud . https://archive.org/details/manuallib-id-2675396/mode/2up
…A quick search for "siemens 98R RF transistor" turns up the Siemens BFT 98 transistor. Looking at the modern datasheet, it comes in case variants with and without a mounting stud. …
… But the datasheet doesn't indicate "98R" marking, so either it's a different part after all, or they changed the markings at some point. …
Yeah, I know: ...
Quote from: tooki on February 25, 2024, 10:02:05 pmYeah, I know: ...I was not attempting to doubt your post nor make an attempt to make you look bad. I was simply adding some information that was lacking in the 2 websites you presented. https://www.web-bcs.com/transistor/tc/bf/BFT98.php does not indicate it is a dual emitter. This can often confuse the novice when doing a search. The second site https://ia801909.us.archive.org/28/items/httpsarchive.orgdetailselectroarch2/S/SiemensTransistorsDataBook1980-81_text.pdf does not indicate the difference between the two variants. This can also cause some confusion to a novice. I apologize for not being clear about my intentions.